Drain Fly Larva

Moist, organic-rich environments such as sewage drains, sink pipes, septic tanks, and wet compost.

They feed on sludge, slime, and microscopic organic matter (biofilm) that accumulates on the inside of pipes and drains.

The larvae live within the gelatinous film of drains; they have a breathing tube that allows them to survive in near-liquid environments. They eventually pupate and emerge as small, fuzzy, moth-like flies.

Generally harmless to humans and do not bite. They represent a nuisance and signify a buildup of organic matter, but their feeding helps break down gelatinous clogs in plumbing.